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Punnett Calc is a genetics calculator that determines all the possible genotypes and phenotypes that can be produced from two given parent genotypes (up to five genes in length). Punnett Calc also calculates the probability of producing individual genotypes, phenotypes, and respective ratios (absence of gene linkage assumed).

Punnett Calc supports the entry of alleles (from left to right) specified by one or two letters/digits. In the case where only two alleles for a given locus are present in both parents, alleles may be specified using the upper and lower case forms of any letter (ex. Parent 1: "Aa", Parent 2: "aa"). In the case where more than two alleles for a given locus are present in both parents, alleles may be specified using any pair of letters/numbers (ex. Parent 1: "C1C2", Parent 2: "C1C3") or individual letters (ex. Parent 1: "A0", Parent 2: "B0"). Locus alleles must be specified using either single letters/numbers or pairs of letters/numbers (ex. valid: X2Y0, invalid: X2Y).

Genotype Mode:

Only parent genotypes are entered. Results include all possible genotypes and the probability of producing each (independent of phenotype).

Phenotype Mode:

Pushing the buttons below each gene pair reveals a punnett square that reflects the results of a monohybrid cross. Mode of inheritance (recessive, dominant, co-dominant, incomplete dominant, sex-linked) is specified by color coding the four possible outcomes of each gene pair via tapping the individual quadrant buttons. Outcomes with like colors are calculated as like phenotypes. Results include the probability of producing each phenotype (green heading), along with color coded genotypes and their respective probability.

Punnett Calc is an essential tool for educators, students, and professionals working in science or medical fields.

What’s New

Version 2.9.2

This app has been updated by Apple to use the latest Apple signing certificate.

Email functionality added, bug fixes

Ratings and Reviews

2.7 out of 5
3 Ratings

3 Ratings

Mixtape Master Mixxy Mix ,


can you tell me if this can be used for botany? and if not can you refer me to an app that can?....

Noseucu ,

it doesent accept known codes for

color coat in dogs, and no instructions, no website for reference. too bad

Gabriel1118 ,

Great educational tool!

This app is great for people starting to learn genetics and punnett squares. It is easy to use and is brightly colored to give it a fun feel while learning. It is very detailed and shows the genotypic ratio as well as the odds of getting the offspring desired. I could definitely see this app being used by serious breeders. This app is very well designed and I would recommend it for those interested in learning genetics and punnett squares!

App Privacy

The developer, RayBrooke Software, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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